<?php

/**
 * Smarty Internal Plugin Resource PHP
 *
 * Implements the file system as resource for PHP templates
 *
 * @package Smarty
 * @subpackage TemplateResources
 * @author Uwe Tews
 * @author Rodney Rehm
 */
class Smarty_Internal_Resource_PHP extends Smarty_Resource_Uncompiled {
	/**
	 * container for short_open_tag directive's value before executing PHP
	 * templates
	 * 
	 * @var string
	 */
	protected $short_open_tag;
	
	/**
	 * Create a new PHP Resource
	 */
	public function __construct() {
		$this->short_open_tag = ini_get ( 'short_open_tag' );
	}
	
	/**
	 * populate Source Object with meta data from Resource
	 *
	 * @param $source Smarty_Template_Source
	 *       	 source object
	 * @param $_template Smarty_Internal_Template
	 *       	 template object
	 * @return void
	 */
	public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {
		$source->filepath = $this->buildFilepath ( $source, $_template );
		
		if ($source->filepath !== false) {
			if (is_object ( $source->smarty->security_policy )) {
				$source->smarty->security_policy->isTrustedResourceDir ( $source->filepath );
			}
			
			$source->uid = sha1 ( $source->filepath );
			if ($source->smarty->compile_check) {
				$source->timestamp = @filemtime ( $source->filepath );
				$source->exists = ! ! $source->timestamp;
			}
		}
	}
	
	/**
	 * populate Source Object with timestamp and exists from Resource
	 *
	 * @param $source Smarty_Template_Source
	 *       	 source object
	 * @return void
	 */
	public function populateTimestamp(Smarty_Template_Source $source) {
		$source->timestamp = @filemtime ( $source->filepath );
		$source->exists = ! ! $source->timestamp;
	}
	
	/**
	 * Load template's source from file into current template object
	 *
	 * @param $source Smarty_Template_Source
	 *       	 source object
	 * @return string template source
	 * @throws SmartyException if source cannot be loaded
	 */
	public function getContent(Smarty_Template_Source $source) {
		if ($source->timestamp) {
			return '';
		}
		throw new SmartyException ( "Unable to read template {$source->type} '{$source->name}'" );
	}
	
	/**
	 * Render and output the template (without using the compiler)
	 *
	 * @param $source Smarty_Template_Source
	 *       	 source object
	 * @param $_template Smarty_Internal_Template
	 *       	 template object
	 * @return void
	 * @throws SmartyException if template cannot be loaded or
	 *         allow_php_templates is disabled
	 */
	public function renderUncompiled(Smarty_Template_Source $source, Smarty_Internal_Template $_template) {
		$_smarty_template = $_template;
		
		if (! $source->smarty->allow_php_templates) {
			throw new SmartyException ( "PHP templates are disabled" );
		}
		if (! $source->exists) {
			if ($_template->parent instanceof Smarty_Internal_Template) {
				$parent_resource = " in '{$_template->parent->template_resource}'";
			} else {
				$parent_resource = '';
			}
			throw new SmartyException ( "Unable to load template {$source->type} '{$source->name}'{$parent_resource}" );
		}
		
		// prepare variables
		extract ( $_template->getTemplateVars () );
		
		// include PHP template with short open tags enabled
		ini_set ( 'short_open_tag', '1' );
		include ($source->filepath);
		ini_set ( 'short_open_tag', $this->short_open_tag );
	}
}

?>